﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;

namespace Intex.Db.Service
{
 
        public class Code39
        {

            private Hashtable m_Code39 = new Hashtable();
            private byte m_Magnify = 0;
            /// <summary>
            /// 放大倍数
            /// </summary>
            public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }

            private int m_Height = Models.Config.CodeHeight - Models.Config.CodeMarginHeight * 2;
            /// <summary>
            /// 图形高
            /// </summary>
            public int Height { get { return m_Height; } set { m_Height = value; } }

            private Font m_ViewFont = null;
            /// <summary>
            /// 字体大小
            /// </summary>
            public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }


            public Code39()
            {

                m_Code39.Add("A", "1101010010110");
                m_Code39.Add("B", "1011010010110");
                m_Code39.Add("C", "1101101001010");
                m_Code39.Add("D", "1010110010110");
                m_Code39.Add("E", "1101011001010");
                m_Code39.Add("F", "1011011001010");
                m_Code39.Add("G", "1010100110110");
                m_Code39.Add("H", "1101010011010");
                m_Code39.Add("I", "1011010011010");
                m_Code39.Add("J", "1010110011010");
                m_Code39.Add("K", "1101010100110");
                m_Code39.Add("L", "1011010100110");
                m_Code39.Add("M", "1101101010010");
                m_Code39.Add("N", "1010110100110");
                m_Code39.Add("O", "1101011010010");
                m_Code39.Add("P", "1011011010010");
                m_Code39.Add("Q", "1010101100110");
                m_Code39.Add("R", "1101010110010");
                m_Code39.Add("S", "1011010110010");
                m_Code39.Add("T", "1010110110010");
                m_Code39.Add("U", "1100101010110");
                m_Code39.Add("V", "1001101010110");
                m_Code39.Add("W", "1100110101010");
                m_Code39.Add("X", "1001011010110");
                m_Code39.Add("Y", "1100101101010");
                m_Code39.Add("Z", "1001101101010");
                m_Code39.Add("0", "1010011011010");
                m_Code39.Add("1", "1101001010110");
                m_Code39.Add("2", "1011001010110");
                m_Code39.Add("3", "1101100101010");
                m_Code39.Add("4", "1010011010110");
                m_Code39.Add("5", "1101001101010");
                m_Code39.Add("6", "1011001101010");
                m_Code39.Add("7", "1010010110110");
                m_Code39.Add("8", "1101001011010");
                m_Code39.Add("9", "1011001011010");
                m_Code39.Add("+", "1001010010010");
                m_Code39.Add("-", "1001010110110");
                m_Code39.Add("*", "1001011011010");
                m_Code39.Add("/", "1001001010010");
                m_Code39.Add("%", "1010010010010");
                m_Code39.Add("$", "1001001001010");
                m_Code39.Add(".", "1100101011010");
                m_Code39.Add(" ", "1001101011010");
            }

            public string SaveToImage(string text)
            {
                if (Models.Config.FontBold)
                {
                    ViewFont = new Font(Models.Config.FontName, Models.Config.FontSize, FontStyle.Bold);
                }
                else
                {
                    ViewFont = new Font(Models.Config.FontName, Models.Config.FontSize);
                }
                Magnify = 1;
                var bitmap = GetCodeImage(string.Format("*{0}*",text), Code39Model.Code39FullAscII, false);
                int totalWidth = Models.Config.CodeWidth;
                if (totalWidth < bitmap.Width)
                    totalWidth = bitmap.Width + Models.Config.CodeMarginWidth * 2;
                var codeImage = new Bitmap(totalWidth, Models.Config.CodeHeight);
                int x = totalWidth - bitmap.Width;
                x = (int)x / 2;
                int y = Models.Config.CodeMarginHeight;
                Graphics g = Graphics.FromImage(codeImage);
                g.FillRectangle(Brushes.White, new Rectangle(Models.Config.CodeMarginWidth, y, totalWidth - Models.Config.CodeMarginWidth, Models.Config.CodeHeight - y * 2));
                g.DrawImage(bitmap, new Point(x, y));
                string fileName = Models.Config.ImageTempPath + Guid.NewGuid().ToString() + ".png";
                codeImage.Save(fileName);
                return fileName;
            }

            public enum Code39Model
            {
                /// <summary>
                /// 基本类别 1234567890ABC
                /// </summary>
                Code39Normal,
                /// <summary>
                /// 全ASCII方式 +A+B 来表示小写
                /// </summary>
                Code39FullAscII
            }
            /// <summary>
            /// 获得条码图形
            /// </summary>
            /// <param name="p_Text">文字信息</param>
            /// <param name="p_Model">类别</param>
            /// <param name="p_StarChar">是否增加前后*号</param>
            /// <returns>图形</returns>
            public Bitmap GetCodeImage(string p_Text, Code39Model p_Model, bool p_StarChar)
            {
                string _ValueText = "";
                string _CodeText = "";
                char[] _ValueChar = null;
                switch (p_Model)
                {
                    case Code39Model.Code39Normal:
                        _ValueText = p_Text.ToUpper();
                        break;
                    default:
                        _ValueChar = p_Text.ToCharArray();
                        for (int i = 0; i != _ValueChar.Length; i++)
                        {
                            if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i] <= 122)
                            {
                                _ValueText += "+" + _ValueChar[i].ToString().ToUpper();

                            }
                            else
                            {
                                _ValueText += _ValueChar[i].ToString();
                            }
                        }
                        break;
                }

                _ValueChar = _ValueText.ToCharArray();
                if (p_StarChar == true) _CodeText += m_Code39["*"];
                for (int i = 0; i != _ValueChar.Length; i++)
                {
                    if (p_StarChar == true && _ValueChar[i] == '*') throw new Exception("带有起始符号不能出现*");
                    object _CharCode = m_Code39[_ValueChar[i].ToString()];
                    if (_CharCode == null) throw new Exception("不可用的字符" + _ValueChar[i].ToString());
                    _CodeText += _CharCode.ToString();
                }

                if (p_StarChar == true) _CodeText += m_Code39["*"];

                Bitmap _CodeBmp = GetImage(_CodeText);
                GetViewImage(_CodeBmp, p_Text);
                return _CodeBmp;
            }

            /// <summary>
            /// 绘制编码图形
            /// </summary>
            /// <param name="p_Text">编码</param>
            /// <returns>图形</returns>
            private Bitmap GetImage(string p_Text)
            {
                char[] _Value = p_Text.ToCharArray();

                //宽 == 需要绘制的数量*放大倍数 + 两个字的宽   
                Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1), (int)m_Height);
                Graphics _Garphics = Graphics.FromImage(_CodeImage);
                _Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));

                int _LenEx = 0;
                for (int i = 0; i != _Value.Length; i++)
                {
                    int _DrawWidth = m_Magnify + 1;
                    if (_Value[i] == '1')
                    {
                        _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
                    }
                    else
                    {
                        _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
                    }
                    _LenEx += _DrawWidth;
                }

                _Garphics.Dispose();
                return _CodeImage;
            }
            /// <summary>
            /// 绘制文字
            /// </summary>
            /// <param name="p_CodeImage">图形</param>
            /// <param name="p_Text">文字</param>
            private void GetViewImage(Bitmap p_CodeImage, string p_Text)
            {
                if (m_ViewFont == null) return;
                Graphics _Graphics = Graphics.FromImage(p_CodeImage);
                SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);
                if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height - 20)
                {
                    _Graphics.Dispose();
                    return;
                }
                int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height + Models.Config.CodeFontPosY;
                _Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height - Models.Config.CodeFontPosY));
                int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;
                _Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);
                _Graphics.Dispose();
            }
        }

    

}
